USCG Blackthorn, Sheridan Tug, Seafood Barge - Wreck Trek
Gulf of Mexico, well offshore from Tampa Bay, FL
Type of diving: Wrecks, boat diving only, spearfishing, photography & video.
Directions: 21 n.miles NW of John's Pass, Madeira Beach, FL. Coordinates, charts & more photos:
Wild West Coast of Florida Section E
Getting to the site: Contact Capt Chad Carney 727-423-7775 or e-mail from
Florida Skin Diver Mobile Scuba
USCG Cutter Blackthorn
What to expect at the dive site: 80' depth, visibility ranges: usually around 25' to 40'. The Sheridan is most intact with a relief of 35', then the Blackthorn at about 18', and the Seafood Barge at about 10'. The Blackthorn typically holds the most grouper, snapper & hogfish because of the many tight hiding places and debris field to the east. The Sheridan attracts the most bait & pelagic species like amberjack, kingfish & cobia. Water temperature varies from approximately 85*F in summer to about 60*F in winter.
The wrecks are close enough to swim from one to another, if you are experienced in U/W navigation and can stretch a tank sufficiently in 80 feet of water. Navigating to the Blackthorn is easiest because of it's south to north alignment. The west to east alignment of the Sheridan & Seafood Barge make navigating more difficult. The swim is 3 to 5 minutes from the Sheridan bow to the Blackthorn. You will see large sections in the eastern debris field before the hull. From the Cutter Blackthorn's rudder swim 1.5 to 2 minutes to the Seafood Barge. The superstructure of the Blackthorn is just under a 1 minute swim away from it's own bow. See
Wreck Trek Sheridan Tug to USCG Blackthorn & Pinellas Seafood Barge for ranges & bearings.
Warnings: Separately the wrecks are intermediate dives, if you do not penetrate.
The Pinellas 2 Wreck Trek (crossing wreck to wreck) is a very advanced dive!
The wrecks are old, rusting & collapsing, with fishing lines & tackle. Boat traffic can be dangerous while diving this wreck trek.
Markers may not be visible or in place due to storms and anchors. Stay as shallow as visibility allows while crossing.
Know your breathing rate and use appropriate capacity tank(s). Visibility and current may add much difficulty to the dive.
Drift dive technique works very well. Carry a deployable signal marker buoy (SMB) and reel.
Captains should be experienced. Observe all dive flag laws and respect other boaters and divers.
Pros and Cons: Great wreck dives & spearfishing despite being a published artificial reef. The Blackthorn's history is captivating, follow this link for the story
Worldandnation: Three minutes that rocked Coast Guard. Minimum run offshore is an hour to 1.5 hours depending on seas. Boat traffic could prohibit immediate anchoring or dropping on the wreck of your choice.
Most recent date visited: Oct 24, 2009.
Capt Chad Carney